Owston's Green Tree Frog

Zhangixalus owstoni or Owston's green tree frog is a species of frog in the family Rhacophoridae which is endemic to Japan. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical seasonally wet or flooded lowland grassland, intermittent freshwater marshes, and irrigated land. It is threatened by habitat loss. The population is currently stable.

The adult male frog is about 42–51 mm long from nose to rear end and the adult female frog is about 50–67 mm long. There is not much webbing on the feet.